CN1728492A - Protector for imbalance of three-phase voltage - Google Patents
Protector for imbalance of three-phase voltage Download PDFInfo
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- CN1728492A CN1728492A CN 200410071759 CN200410071759A CN1728492A CN 1728492 A CN1728492 A CN 1728492A CN 200410071759 CN200410071759 CN 200410071759 CN 200410071759 A CN200410071759 A CN 200410071759A CN 1728492 A CN1728492 A CN 1728492A
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Abstract
The protector is installed at end of three-phase four-wire circuit, i.e. at front end of single-phase branch circuit. When neutral line is in fault and voltage in three-phase is out of balance, the protector cuts off each single-phase branch circuit automatically. The protector is composed of lightning arrester, voltage reduced rectification, parallel voltage regulation, cascaded voltage regulation, sampling circuit, single chip, drive coil, contact switch and state of contact. Through lightning arrester, voltage reduced rectification, parallel and cascaded voltage regulations, voltage in three-phase four-wire applies power for single chip. Parallel voltage regulation supplies power for the drive coil. Sampling circuit or circuit of contact state is built for single chip for sampling data. Program of the single chip processes sampled data, and controls the drive coil, and is in use for controlling on/off of the contact switch, or cutting off each single-phase branch circuit.
Description
Technical field:
The invention belongs to low pressure three electric appliances, be mainly concerned with in the three-phase and four-line low-voltage power supply system, the uniline overvoltage that causes by reasons such as neutral line fault and imbalance of three-phase voltage, a kind of protector of under voltage.
Background technology:
In the three-phase and four-line low-voltage supply line, A, B, C triple line all form the loop in N line (neutral line), the single phase poaer supply 220V of residential houses is supplied with by the phase line and the neutral line, adopt in TN-S, TN-C-S, the TN-C distribution system at civilian power supply, reasons such as, misphase excessive, the high-tension line phase failure, transformer fault owing to the resistance of broken neutral line, neutral line line, all make uniline voltage be higher than 220V or be lower than 220V, cause single-phase equipment to be damaged.
In the low-voltage distribution system of developed country, general civilian power supply adopts the single-phase transformer distribution system, does not have the neutral line in this distribution system, does not have the single-phase overvoltage or the under voltage problem that are caused by neutral line fault.
The civilian power supply of China adopts TN-S; TN-C-S; the TN-C distribution system; present state-of-the-art resist technology is; installed at single-phase circuit user entry place, downstream (in the distribution box); the under voltage protection device; its technique effect is: when circuit took place; automatic line disconnection during under voltage; when recovering normal voltage, connects in circuit circuit automatically; its typical case is represented as; Chinese invention patent ZL96117305.X full-automatic single-phase potential error protector and 00129110.6 intelligent uniphase voltage deviation protector; its shortcoming is that a family is installed one; to whole Lou Eryan, cost is higher.Though disclosed 87100154 protector for null line breaking of Chinese patent and 92238514 neutral line potential shift integrated protection circuit breakers; also having the neutral line can open-circuit line when breaking down; but its reliability, stability, self fail safe have certain deficiency, more can not disconnect the downstream circuit when the high-tension line phase failure or transformer fault cause imbalance of three-phase voltage.
Summary of the invention:
The present invention is exactly to provide a kind of three-phase and four-line lower pressure downstream line end single-phase lines upstream front end of branch (in the Civil apartment power distribution cabinet) just that is installed in order to overcome above deficiency, and technique effect is,
1 works as broken neutral line, and protector then cuts off each branch's uniline, and shows current state.
2 is excessive when the resistance of neutral line line, causes uniline variation 220 ± 20, and protector then cuts off each branch's uniline, and shows current state.
3 cause low pressure three-phase line Voltage unbalance by the high-tension line fault, and protector then cuts off each branch's uniline, and show current state.
4 cause low pressure three-phase line Voltage unbalance by the power transformer winding fault, and protector then cuts off each branch's uniline, and show current state.
5 when three-phase line voltage phase shortage, and protector does not then cut off each branch's uniline.
The anti-transient overvoltage of 6 built-in circuits impacts and surpasses 4.5KV.
7 normal working voltage modes have:
When (1) A, B, C, N exist simultaneously, but operate as normal.
(2) A, B, C exist and the N disconnection simultaneously, but operate as normal.
(3) A, B existence or B, C existence or A, C exist and the N disconnection, but operate as normal.
(4) when N connects, as long as A, B are arranged, when any single-phase voltage of C exists, but operate as normal.
8 can be at-35 ℃---under+50 ℃ of ambient temperatures, and operate as normal.
9 when break contact breaks down, and can show automatically.
For reaching above-mentioned purpose; the present invention proposes a kind of technical scheme (Fig. 1) of protector for imbalance of three-phase voltage, and this scheme is made up of lightning arrester (1), step-down rectifier (2), parallel voltage-stabilizing (3), series connection voltage stabilizing (4), sample circuit (5), single-chip microcomputer (6), drive coil (7), switch contacts (8), contact state (9).Its technical characterictic is, single-chip microcomputer (6) power supply is to be supplied with by lightning arrester (1), step-down rectifier (2), parallel voltage-stabilizing (3) series connection voltage stabilizing (4) by the voltage of three-phase and four-line, and the power supply of drive circuit coil (7) is then directly provided by parallel voltage-stabilizing (3); The data sampling of single-chip microcomputer (6) is then provided by sample circuit (4) and contact state (9) circuit; The output control of single-chip microcomputer (6) then makes switch contacts (8) action by drive circuit coil (7); Realize technical indicator by programming.
Above-mentioned lightning arrester (1) is made up of low-frequency choke coil and bipolar diode, and its technical characterictic is, low-frequency choke coil is connected in the input phase line, then with the neutral line between the bipolar diode of anti-transient impact in parallel; Step-down rectifier (2) is made up of electric capacity and diode, and its technical characterictic is, electric capacity is connected on respectively in the three-phase line, and the diode pair three-phase line and the neutral line carry out rectification; Parallel voltage-stabilizing (3) is made up of voltage stabilizing didoe, 2W to 5W resistance, triode, and its technical characterictic is that transistor base connects voltage stabilizing didoe one end, transistor collector series connection 2W to 5W resistance; Series connection voltage stabilizing (4) is made up of resistance, diode, voltage stabilizing didoe, triode, and its technical characterictic is transistor base series connection voltage stabilizing didoe and temperature compensated diode, transistor base and collector electrode parallel resistance; Sample circuit (5) is made up of diode and resistance, and technical characterictic is, is connected between phase line and the single-chip microcomputer input by the branch road of diode series resistance; Contact state (9) is made up of diode and resistance, and technical characterictic is, is connected after the switch contacts between the level phase line and single-chip microcomputer input by the branch road of diode series resistance; Drive coil (7) is made up of resistance, triode, relay coil or contactor coil or breaker coil, and technical characterictic is that the transistor base series resistance connects and the single-chip microcomputer output, the transistor collector series coil; Switch contacts (8) is made up of relay or contactor or three groups of contacts of breaker, and technical characterictic is that three groups of contacts are connected on respectively in each branch's uniline.
Description of drawings:
Fig. 1 is the feature schematic diagram of overall technical architecture of the present invention
Label among Fig. 1:
(1), lightning arrester (2), step-down rectifier (3), parallel voltage-stabilizing
(4), series connection voltage stabilizing (5), sample circuit (6), single-chip microcomputer
(7), drive coil (8), switch contacts (9), contact state
Fig. 2 is an embodiment of the invention schematic diagram
Label among Fig. 2:
A, B, C are phase line, and N is the neutral line; L is a low-frequency choke coil; TVS is a bipolar diode; C is an electric capacity; T is a triode; D is a diode; DZ is a voltage stabilizing didoe; R is a resistance; DPJ is a single-chip microcomputer; J is relay coil or contactor coil or breaker coil; K is a switch contact; DF is a light-emitting diode.
Further specify below in conjunction with embodiment Fig. 2, A, B, the voltage of C three-phase line passes through the impact of the anti-transient overvoltage of L1-L3 low-frequency choke coil respectively, utilize the TVS1-TVS3 bipolar diode further to absorb to residual overvoltage, normal voltage is through C1--C3 capacitance decompression and D1--D8 diode rectification, process is by the DZ1 voltage stabilizing didoe, R2 resistance, the shunt regulating circuit voltage stabilizing that the T2 triode is formed is supplied with the J coil and is done driving power, process is by R3 resistance, the D11 diode, the DZ2 voltage stabilizing didoe, the voltage of the serial regulating circuit that the T2 triode is formed is supplied with the DPJ single-chip microcomputer and is done the control power supply, by D12, D13, D14 diode and R11, R12, R13, R14, R15, the A that R16 resistance is formed, B, C three tunnel takes a sample and supplies with the processing of DPJ single-chip microcomputer in line voltage distribution, after the program in the DPJ single-chip microcomputer is to three road voltage analysis, drive the J coil by R7 resistance and T3 triode, make the line disconnection of three groups of K contacts or connect circuit, then, by doing further affirmation for the DPJ single-chip microcomputer to the contact state signal feedback, show current malfunction by DF by D16--D18 diode and R8--R10 resistance.
The above, it only is preferred embodiment of the present invention, be not to pro forma restriction of the present invention, every after having seen technical solution of the present invention and embodiment, only any change of carrying out in the local techniques feature, make the open-and-shut technology of those skilled in the art, can be considered and be equal to replacement, all belong to technical solution of the present invention.
Claims (9)
1, a kind of protector for imbalance of three-phase voltage is made up of lightning arrester (1), step-down rectifier (2), parallel voltage-stabilizing (3), series connection voltage stabilizing (4), sample circuit (5), single-chip microcomputer (6), drive coil (7), switch contacts (8), contact state (9).Its technical characterictic is, single-chip microcomputer (6) power supply is to be supplied with by lightning arrester (1), step-down rectifier (2), parallel voltage-stabilizing (3) series connection voltage stabilizing (4) by the voltage of three-phase and four-line, and the power supply of drive coil (7) is then directly provided by parallel voltage-stabilizing (3); The data sampling of single-chip microcomputer (6) is then provided by sample circuit (4) or contact state (9) circuit; Single Chip Microcomputer (SCM) program is handled and controlling and driving coil (7) sampled data, makes switch contacts (8) switch on or off each branch's uniline.
2, be made up of the bipolar diode of low-frequency choke coil and anti-transient overvoltage according to claim 1 described lightning arrester (1), its technical characterictic is, low-frequency choke coil is connected in the phase line, and bipolar diode is connected in parallel on behind the choke between the level and the neutral line.
3, be made up of electric capacity and diode according to claim 1 described step-down rectifier (2), its technical characterictic is, electric capacity is to the step-down respectively of three-phase line voltage, and diode then all carries out rectification to voltage after the step-down and neutral line voltage.
4, be made up of voltage stabilizing didoe, 2W to 5W resistance, triode according to claim 1 described parallel voltage-stabilizing (3), its technical characterictic is that transistor base connects voltage stabilizing didoe one end, transistor collector series connection 2W to 5W resistance.
5,1 described series connection voltage stabilizing (4) is made up of resistance, diode, voltage stabilizing didoe, triode according to claim, and its technical characterictic is transistor base series connection voltage stabilizing didoe and temperature compensated diode, transistor base and collector electrode parallel resistance.
6, be made up of diode and resistance according to claim 1 described sample circuit (5), technical characterictic is to be connected between phase line and the single-chip microcomputer input by the diode series resistance.
7, be made up of diode and resistance according to claim 1 described contact state (9), technical characterictic is, is connected after the switch contacts between the level and single-chip microcomputer input by the diode series resistance.
8, be made up of resistance, triode, relay or contactor coil or breaker coil according to claim 1 described drive coil (7) circuit, technical characterictic is that the transistor base series resistance connects and the single-chip microcomputer output, the transistor collector series coil.
9, be made up of relay or contactor or three groups of contacts of breaker according to claim 1 described switch contacts (8), technical characterictic is that three groups of contacts are connected on respectively in each branch's uniline.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410071759 CN1728492A (en) | 2004-07-27 | 2004-07-27 | Protector for imbalance of three-phase voltage |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200410071759 CN1728492A (en) | 2004-07-27 | 2004-07-27 | Protector for imbalance of three-phase voltage |
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| Publication Number | Publication Date |
|---|---|
| CN1728492A true CN1728492A (en) | 2006-02-01 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200410071759 Pending CN1728492A (en) | 2004-07-27 | 2004-07-27 | Protector for imbalance of three-phase voltage |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN102158092A (en) * | 2011-04-26 | 2011-08-17 | 武汉盛帆电子股份有限公司 | Three-phase buck type switch power supply module |
| CN102624251A (en) * | 2011-01-25 | 2012-08-01 | 车王电子(宁波)有限公司 | Multi-phase generator rectifier |
| CN102751694A (en) * | 2011-04-22 | 2012-10-24 | 北京维通利电气有限公司 | Device and method for controlling neutral wire breaking protection |
| CN103869202A (en) * | 2012-12-13 | 2014-06-18 | 国家电网公司 | Transformer high-tension side phase-failure detection method and system |
| CN103904914A (en) * | 2014-03-18 | 2014-07-02 | 许继电气股份有限公司 | Power supply device and N-line-lacking protection circuit |
| CN105448609A (en) * | 2015-11-19 | 2016-03-30 | 广东电网有限责任公司珠海供电局 | Voltage trip device |
| CN106451467A (en) * | 2016-10-25 | 2017-02-22 | 三尔梯(泉州)电气制造有限公司 | Three-phase full-automatic voltage-stabilizing electric energy restorer and restoration method |
| WO2021000610A1 (en) * | 2019-07-04 | 2021-01-07 | 王振铎 | Voltage balancing and stabilizing apparatus and method |
-
2004
- 2004-07-27 CN CN 200410071759 patent/CN1728492A/en active Pending
Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101951134A (en) * | 2010-08-24 | 2011-01-19 | 艾默生网络能源有限公司 | Cascade topology frequency converter and bypass topology thereof |
| CN102624251A (en) * | 2011-01-25 | 2012-08-01 | 车王电子(宁波)有限公司 | Multi-phase generator rectifier |
| CN102751694A (en) * | 2011-04-22 | 2012-10-24 | 北京维通利电气有限公司 | Device and method for controlling neutral wire breaking protection |
| CN102158092A (en) * | 2011-04-26 | 2011-08-17 | 武汉盛帆电子股份有限公司 | Three-phase buck type switch power supply module |
| CN102158092B (en) * | 2011-04-26 | 2013-09-11 | 武汉盛帆电子股份有限公司 | Three-phase buck type switch power supply module |
| CN103869202A (en) * | 2012-12-13 | 2014-06-18 | 国家电网公司 | Transformer high-tension side phase-failure detection method and system |
| CN103869202B (en) * | 2012-12-13 | 2016-07-13 | 国家电网公司 | The detection method of the disconnected phase of high voltage side of transformer and system |
| CN103904914A (en) * | 2014-03-18 | 2014-07-02 | 许继电气股份有限公司 | Power supply device and N-line-lacking protection circuit |
| CN103904914B (en) * | 2014-03-18 | 2017-08-25 | 许继电气股份有限公司 | Supply unit and its scarce N lines protection circuit |
| CN105448609A (en) * | 2015-11-19 | 2016-03-30 | 广东电网有限责任公司珠海供电局 | Voltage trip device |
| CN106451467A (en) * | 2016-10-25 | 2017-02-22 | 三尔梯(泉州)电气制造有限公司 | Three-phase full-automatic voltage-stabilizing electric energy restorer and restoration method |
| WO2021000610A1 (en) * | 2019-07-04 | 2021-01-07 | 王振铎 | Voltage balancing and stabilizing apparatus and method |
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